JP3155674B2 - Interphase spacer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interphase spacer using a polymer insulator as an insulator, provided with a bending detecting component.

[0002]

2. Description of the Related Art When a power transmission line is blown by a strong wind in a state where ice and snow are attached, or when the attached ice and snow fall at the same time, galloping (intense vertical vibration) is caused. At this time, electric wires come into contact with each other to cause a short-circuit between phases, or the electric wires come into contact with an overhead ground wire to cause a ground fault.
As shown in FIG. 5, the inter-phase spacer 2 is a rod-shaped insulator for preventing the electric wires 8 from contacting each other or the electric wire 8 and an overhead ground wire (not shown) when galloping occurs. Mounted in the form of a stick on etc. This interphase spacer 2 is formed by connecting a large number of cap-shaped insulators 9,
Conventionally, a porcelain insulator has been used for the shade insulator 9. Incidentally, in the drawing, reference numeral 10 denotes an electric wire attachment frame. By the way, each time the electric wire vibrates, the inter-phase spacer 2 receives a tensile load and a compressive load from the upper and lower electric wires 8 to which it is attached. When the compression load is large, the interphase spacer 2 is elastically curved. At this time, the porcelain insulator is susceptible to bending and may be broken. Therefore, it was necessary to increase the cross-sectional area of the interphase spacer 2 so as not to bend even when a compressive load was applied. However, when the cross-sectional area was increased, the weight of the interphase spacer 2 increased and exceeded the limit load of the transmission line. woke up. Furthermore, in recent years, with the increase in power transmission capacity, the interval between the electric wires 8 has widened, and the interphase spacer 2 has an elongated shape and tends to be easily curved. From such a thing,
Lightweight organic insulators (hereinafter referred to as polymer insulators) have been used as insulators for the interphase spacer. This polymer insulator is formed by covering a FRP (fiber reinforced plastic) molded body with a cap-like silicon rubber or the like.

[0003]

The above-mentioned polymer insulator is relatively strong against bending deformation, and even if a bending load is applied by galloping or three-jump, etc.
Since it bends elastically, it does not break immediately. However, in the case where the curve exceeds the allowable limit, the FRP molded body of the polymer insulator cracks vertically. After the bending load is released even if a vertical crack occurs, the polymer insulator also returns to its original shape, and the appearance of a vertical crack in the polymer insulator cannot be detected from the exterior. If the polymer insulator bends several times beyond the allowable limit, the FRP molded body of the polymer insulator will increase in longitudinal cracks, and the FRP molded body will break up and break through the silicone rubber layer. If the silicone rubber layer is torn, water will penetrate into the FRP molded body or the bonding interface between the silicone rubber layer and the FRP molded body from the breach, and there is a danger that the interphase spacer using the polymer insulator will break down. An object of the present invention is to provide an interphase spacer using a polymer insulator that can detect that an interphase spacer using a polymer insulator as an insulator is bent beyond an allowable limit and prevent a dielectric breakdown of the polymer insulator. .

[0004]

According to the present invention, there is provided an interphase spacer using a polymer insulator as an insulator, wherein the polymer insulator is curved beyond an allowable limit .
Then , the interphase spacer is provided with a bending detection component that falls off, deforms, or changes color .

[0005] The correlation spacer of the present invention comprises a polymer insulator provided with a bending detection component, and the detection component can easily detect from the outside that the interphase spacer has bent beyond an allowable limit. In the detection component, if the polymer insulator is excessively curved beyond the permissible limit, it will fall off, deform, discolor, etc. Any part for which is detected can be applied. In the present invention,
The location where the bending detecting component is provided is preferably the central portion of the polymer insulator where the bending curvature is minimized.

[0006]

The interphase spacer of the present invention shows that the polymer insulator is curved beyond the permissible limit,
A bending detection component capable of detecting is provided. Therefore, the interphase spacer can be repaired or replaced before the polymer insulator is severely damaged and the interphase spacer is broken down, so that the interphase spacer can be prevented from being broken down.

[0007]

Embodiments of the present invention will be described below. (Embodiment 1) FIG. 1 is an explanatory view showing a first embodiment of an interphase spacer according to the present invention. This inter-phase spacer 1 is provided with a two-part cavity body 3 as a bending detection part at the center thereof. This two-part cavity 3 is a vertically divided half of a hollow body having the same inner surface shape as the outer shape of four continuous shades at the center of the polymer insulator 5.
It is installed to wrap around. The two-piece cavity 3 is made of plastic or the like, and the two pieces are connected to each other by utilizing the elastic force. The bonding strength of the two-piece cavity 3 is set to a strength that is released when the polymer insulator 5 curves beyond an allowable limit. In the figure, reference numeral 11 denotes a coupling projection, and a coupling concave portion is formed in the cavity body on the other side.

FIG. 2 shows a state in which the polymer insulator 5 is bent beyond the allowable limit and the two-part cavity body 3 of the bending detection component comes off the polymer insulator 5. When the interphase spacer 1 receives a strong compressive load from the electric wires 8 at both ends and bends beyond the permissible limit, the polymer insulator 5
Is applied to push the two-part cavity 3 outward.
With this force, the joint of the two-piece cavity 3 is released, and the two-piece cavity 3 is divided into two and falls from the polymer insulator 5. When the two-piece cavity 3 falls from the polymer insulator 5, it is detected that the polymer insulator 5 is curved beyond the allowable limit. In places where the two-part cavity 3 is not suitable for dropping,
It is preferable that the divided hollow body 3 is bound to the polymer insulator 5 with a string or the like. The material of the two-piece cavity 3 is a plastic material having a certain hardness, for example, nylon, polyethylene,
Fluorinated ethylene and the like are preferred. As a method for joining the two-piece cavity, any method such as a method using an adhesive can be applied in addition to a mechanical joining method such as a chuck type, a hook type, and a button type.

(Embodiment 2) FIG. 3 is an explanatory view showing another embodiment of the interphase spacer according to the present invention. This inter-phase spacer 1 is provided with a bending detection component 4 at the center of a polymer insulator 5. This bending detection component 4
It comprises a metal ring 6 and a support frame 7 for supporting the metal ring. The metal ring 6 is attached to a central portion of the polymer insulator 5 with a predetermined interval up and down by a support frame 7. The mounting interval between the two metal rings 6 is such that when the polymer insulator 5 is bent beyond the allowable limit,
This is the interval at which they make strong contact with each other. When the polymer insulator 5 curves beyond the allowable limit, as shown in FIG. 4, the two metal rings 6 come into strong contact with each other, and the support frame 7 is deformed. The support frame 7 is made of a polymer insulator 5
Is still deformed even after returning to the linear shape, it is possible to detect that the polymer insulator 5 has curved beyond the allowable limit by looking at the appearance later. For the support frame 7, an aluminum material or the like which is easily plastically deformed is used. In this method, the degree of bending can be quantitatively determined based on the amount of deformation of the support frame 7.

As another bending detecting component, there is a component in which a pressure-sensitive element is attached to the metal ring. In this detection component, the pressure-sensitive element is discolored by the contact pressure between the metal rings, and the contact pressure, that is, the polymer insulator 5 is determined by the degree of the discoloration.
This is a method of determining the degree of curvature of the.

[0011]

As described above, according to the present invention,
The polymer insulator 5 is bent beyond an allowable limit boundary, ground, since it detected visually or the like in helicopter machine, before phase <br/> spacer over causes a dielectric breakdown, such as replacing the interphase spacer Action is possible.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of an interphase spacer of the present invention.

FIG. 2 is an explanatory view showing a state in which the interphase spacer shown in FIG. 1 is curved.

FIG. 3 is an explanatory view showing another embodiment of the interphase spacer of the present invention.

FIG. 4 is an explanatory view showing a state during and after bending of the interphase spacer shown in FIG. 3;

FIG. 5 is an explanatory diagram of an interphase spacer.

[Explanation of symbols]

 1, 2─ spacer between phases 3─── Bending detection component using two-piece cavity 4─── Bending detection component using metal ring 5 Polymer insulator 6─── Metal ring 7─── Support frame 8 wire 9 wire cap insulator 10 wire mounting frame 11 connection projection

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-247912 (JP, A) JP-A-1-112617 (JP, A) JP-A-4-87113 (JP, A) JP-A-7- 274364 (JP, A) Japanese Utility Model 5-2535 (JP, U) Japanese Utility Model 4-118729 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01B 17/00-17 / 56 H02G 7/12

Claims (1)

(57) [Claims] 1. In an interphase spacer using a polymer insulator as an insulator, if the polymer insulator bends beyond an allowable limit, the polymer insulator may fall off, be deformed, or be deformed.
Is an interphase spacer, which is provided with a bending detecting component that changes color .